Biology 9700 · AS & A Level · Testing for biological molecules
Testing for biological molecules — practice question
Fig. 1.1 summarises the movement of energy through a forest ecosystem. The thickness of the arrows is proportional to the amount of energy transferred between each part of the ecosystem.
(a)[1]
On Fig. 1.1, add an arrow to show where the ecosystem gets its initial energy input.
(b)[1]
State the process indicated by $A$.
(c)[1]
State one kind of organism that belongs to the decomposer system.
(d)[2]
Name two processes represented by arrow $B$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Arrow pointing into the food web box” …